Amalgamator



(No Model.)

' A. C. MCDONALD.

AMALGAMATOR.

Patented Sept. 4, 1894.

UNITED STATES PATENT OFFICE.

ALEXIS o. MCDONALD, OF GRANITE, MONTANA.

AMALGAMATOR.

SPECIFICATION forming part of Letters Patent No. 525,352,dated September 4, 1894,

Application filed May 17,1894. Serial No. 511,609. (No model.) i I To all whom it may concern:

Be it known that I, ALEXIS C. MCDONALD, a citizen of the United States, residing at Gran- 1te, 1n the county of Granite and State of Montana, have invented certain new and useful Improvements in Amalgamators; and I do doclare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertalns'to make and use the same.

My invention relates to improvements in am'algamators especially adapted for treating or washing gold and it has forits object to secure that end in an efficient and expeditious manner with simple and readily actuated apparatus, and it consists of the combination and arrangement of the parts substantially as hereinafter more fully disclosed and pointed out in the claims.

The figure is an elevation and partly sectional view of my amalgamator.

In carrying out my invention I employ an outside inverted cone-shaped receptacle 1 whose bottom is the quicksilver or mercury chamber 9 and which is provided with amalgam-discharge openings or outlets 10 fitted wlth screw-plugs 10. Within this receptacle and intact therewith, is arranged a second bottomless correspondingly-shaped receptacle 2 with its lower end some distance above the bottom of the outer receptacle and compassed by spiral or serpentine conveyors 7, in cross-section, fitting snuglythe intervening space between said receptacles, to elevate and discharge the water assisted by centrifugal action of the two receptacles said conveyers each having at its lower end an agitator 8 to enter and keep the quicksilver in motion.-

The outer receptacle 1 is carried by a vertical shaft 3 passing therethrough and suitably supported above and below in bearings 18,

the upper bearing having its sleeve or tubular portion provided with a set-screw 19 engaging said shaft.

The outer receptacle 1 has a number of waste-outlets 11, and has on its upper edge a projection or knocker 13 to engage a pendant 14 on the feed chute 12 to agitate the chute and thus aid the feeding of the gold or precious ore into the inner receptacle for washing or treatment.

inner one at say thirty revolutions, per minute, by a shaft 17 suitably supported and journaled in position and carrying two different diametered, beveled cog-wheels 17 and 17 geared to a beveled cogged surface 17 on the bottom of the receptacle 1 and a small beveled cog-wheell'? on the shaft 3, respectively. The outer receptacle also carries two beveled guide rollers 15 traveling on a circular track 16, suitably supported in position as shown, to render the motion of said receptacle steady. g

It will be seen that the amalgamator thus constructed is expeditious and efficient in action, and is simple and has a maximum capacity for work.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In an amalgamator, the combination of I the two oppositely revolving and differently speeded cone-shaped receptacles, one having spiral elevators arranged between the two receptacles to elevate or discharge the water substantially as set forth.

2. In an amalgamator, the combination ofv an inner and outer cone-shaped receptacle, the inner one having spiral elevators arranged between the two receptacles and their lower ends carrying agitators dippinginto the mer cury and keeping it in motion, substantially as set forth.

3. In an amalgamator, the combination of the outer and inner cone-shaped receptacles one'carried by a central shaft and the other being bottomless and having its lower end some distance above the bottom of the aforesaid receptacle and said inner receptacle being connected by arms to a tube or sleeve resting upon the bottom of said outer receptacle, substantially as set forth.

4:. In an amalgamator, the combination of the outer cone shaped receptacle carrying steadying rollers traveling on a circular track, ferent rates, substantially as and for the pur- 10 a knocker or projection engaging a pendant pose set forth.

on the feed-chute, and having a mercury or In testimony whereof Iaftix my signature 1n quicksilver chamber in its bottom, and an inpresence of two witnesses.

5 ner cone-shaped receptacle having spiral con- ALEXIS C MCDONALD veyers or elevators arranged between said re- A p ceptacles and carrying agitators for the mer- Witnesses: cnry in the outer receptacle, and gearing for ANDY MCMILLEN, driving and speeding said receptacles at dif-' J. E. PADDY. 

